摘要
声波共振管教学实验是理解声波的传播、叠加和共振物理问题的基础,也是了解驻波法测量材料吸声系数和声阻抗的基础.通过对非理想条件下的实验现象的观察,可以促进学生进一步思考,理解声波的增强和减弱及其在工业领域的应用.本文就声波共振管教学实验中最小共振频率测量、管中驻波声压分布及其管口修正等问题进行了探讨.
Teaching experiments of acoustic resonance in tubes are bases not only to understand the physical phenomena of acoustic wave propagate,superposition and resonance,but also to understand the basic physic mechanism of measuring the sound absorption coefficient and acoustic impedance of materials.Some non-ideal conditions in this experiment can promote students to think further,and to understand the enhancement and attenuation of sound wave and its application in the field of industry.Measurement of the minimum resonant frequency,sound pressure distribution of waves and end corrections are investigated.
作者
弓文平
王引书
白在桥
陈学智
GONG Wen-ping;WANG Yin-shu;BAI Zai-qiao;CHEN Xue-zhi(Department of Physics,Beijing Normal University,Beijing 100875,China)
出处
《大学物理》
2018年第11期21-23,57,共4页
College Physics
基金
北京市教改项目(2015-ms060)资助
关键词
声波共振管
最小共振频率
声场分布
管口修正
acoustic resonance tube
minimum resonance frequency
sound field distribution
end corrections
